Fix for 'Create part' Quick Fix.

pkg/analysis_server/lib/src/services/refactoring/move_file.dart

Index: pkg/analysis_server/lib/src/services/refactoring/move_file.dart
diff --git a/pkg/analysis_server/lib/src/services/refactoring/move_file.dart b/pkg/analysis_server/lib/src/services/refactoring/move_file.dart
index 3f24fa942f121814a79c1b8909c53ede0241756b..654fc4ff50dde035ca32c7380b36fed5c5aef41f 100644
--- a/pkg/analysis_server/lib/src/services/refactoring/move_file.dart
+++ b/pkg/analysis_server/lib/src/services/refactoring/move_file.dart
@@ -92,7 +92,8 @@ class MoveFileRefactoringImpl extends RefactoringImpl
     String refDir = pathContext.dirname(reference.file);
     // try to keep package: URI
     if (_isPackageReference(reference)) {
-      Source newSource = new NonExistingSource(newFile, UriKind.FILE_URI);
+      Source newSource = new NonExistingSource(
+          newFile, pathos.toUri(newFile), UriKind.FILE_URI);
       Uri restoredUri = context.sourceFactory.restoreUri(newSource);
       if (restoredUri != null) {
         return restoredUri.toString();